On Fri, Sep 7, 2012 at 7:01 AM, Andi Kleen <a...@firstfloor.org> wrote: > From: Andi Kleen <a...@linux.intel.com> > > For parallel LTO builds setting -fmem-report does not work very well > because all the LTRANS phases dump it in parallel and typically interleave > it to unreadability. > > Since usually the memory bottleneck is WPA add a flag to only dump > the memory report for that. > > Passed bootstrap and testsuite on x86_64.
Ok. Thanks, Richard. > 2012-09-06 Andi Kleen <a...@my.domain.org> > > * gcc/common.opt (-fmem-report-wpa): Add > * gcc/doc/invoke.texi (-fmem-report-wpa): Document. > * gcc/lto/lto.c (do_whole_program_analysis): Run mem_report > when mem_report_wpa is set. > --- > gcc/common.opt | 4 ++++ > gcc/doc/invoke.texi | 7 ++++++- > gcc/lto/lto.c | 2 ++ > 3 files changed, 12 insertions(+), 1 deletions(-) > > diff --git a/gcc/common.opt b/gcc/common.opt > index 87e28b5..73eebf4 100644 > --- a/gcc/common.opt > +++ b/gcc/common.opt > @@ -1470,6 +1470,10 @@ fmem-report > Common Report Var(mem_report) > Report on permanent memory allocation > > +fmem-report-wpa > +Common Report Var(mem_report_wpa) > +Report on permanent memory allocation in WPA only > + > ; This will attempt to merge constant section constants, if 1 only > ; string constants and constants from constant pool, if 2 also constant > ; variables. > diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi > index 6cf7cec..5a5f9d2 100644 > --- a/gcc/doc/invoke.texi > +++ b/gcc/doc/invoke.texi > @@ -328,7 +328,7 @@ Objective-C and Objective-C++ Dialects}. > -feliminate-unused-debug-symbols -femit-class-debug-always @gol > -fenable-@var{kind}-@var{pass} @gol > -fenable-@var{kind}-@var{pass}=@var{range-list} @gol > --fdebug-types-section @gol > +-fdebug-types-section -fmem-report-wpa @gol > -fmem-report -fpre-ipa-mem-report -fpost-ipa-mem-report -fprofile-arcs @gol > -frandom-seed=@var{string} -fsched-verbose=@var{n} @gol > -fsel-sched-verbose -fsel-sched-dump-cfg -fsel-sched-pipelining-verbose @gol > @@ -5132,6 +5132,11 @@ pass when it finishes. > Makes the compiler print some statistics about permanent memory > allocation when it finishes. > > +@item -fmem-report-wpa > +@opindex fmem-report-wpa > +Makes the compiler print some statistics about permanent memory > +allocation for the WPA phase only. > + > @item -fpre-ipa-mem-report > @opindex fpre-ipa-mem-report > @item -fpost-ipa-mem-report > diff --git a/gcc/lto/lto.c b/gcc/lto/lto.c > index 5da5412..3c59299 100644 > --- a/gcc/lto/lto.c > +++ b/gcc/lto/lto.c > @@ -2016,6 +2016,8 @@ do_whole_program_analysis (void) > /* Show the LTO report before launching LTRANS. */ > if (flag_lto_report) > print_lto_report (); > + if (mem_report_wpa) > + dump_mem_report (); > } > > > -- > 1.7.7 >